Cataclysmic 1831 Eruption Traced to Quadruple Volcano on Abandoned Soviet Island

This Cold War outpost concealed more than submarines—it hosted a devastating eruption that cooled the planet nearly 200 years ago.

May 28, 2025 - 22:50
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Cataclysmic 1831 Eruption Traced to Quadruple Volcano on Abandoned Soviet Island
The island of Simushir, with four volcanoes dotted across it.

This Cold War outpost concealed more than submarines—it hosted a devastating eruption that cooled the planet nearly 200 years ago.